Abstract: File dividers having slidable tabs for systematic and efficient management of files are provided. A track is attached to a file divider such that the track runs substantially parallel to a file divider edge. A tab has a terminal end that wraps around a portion of the track to be capable of sliding along the track. In another embodiment, a slit running substantially parallel to a file divider edge is formed on an extended leaf, so that terminal portions of a tab can be inserted into the slit to be able to slide along the slit. In still another embodiment, a guiding track substantially parallel to a file divider edge slideably interlocks with a mating member of a tab. Lastly, a tab can have a pair of retention lips to hold a support bar or a track in order to be capable of sliding along the support bar or the track.